My Account
My Garage
Shopping Cart

Shopping Cart

0 items in your Cart
View Cart
Subtotal
Track
My Order
MY GARAGE Select Vehicle
MY GARAGE

Gibson Exhaust 18603 Cat-Back Single Exhaust System Aluminized

(2007-2021 Toyota Tundra)

Part of: Gibson Performance Single Side Cat-Back Exhaust System

Other options in this family: Gibson Exhaust 619995 Gibson Exhaust 319675 Gibson Exhaust 315536 Gibson Exhaust 618815B Gibson Exhaust 315599

Manufacturer

Picture for manufacturer Gibson Exhaust

Part Number

18603
4 reviews
Sale Price

$719.89

1 left at this price

delivery box

Usually delivered within 2 days

free shipping

FREE SHIPPING

Check out with

ApplePay
Authorize Seller Badge
No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Gibson Exhaust 18603 Cat-Back Single Exhaust System delivers exceptional performance gains for trucks and SUVs needing improved towing capacity, acceleration, and passing power. This aluminized steel exhaust system features a single side exit design that routes exhaust behind the rear tire, providing a quieter cabin environment compared to dual exhaust configurations while maximizing low-end torque.

Performance Benefits:

  • Dyno-tested horsepower gains averaging 10-15 HP
  • Torque increase of 15-20 lb-ft, optimized for low-end power (1800-3000 RPM)
  • Enhanced acceleration, hill climbing, and towing capability
  • Minimal interior drone for comfortable highway cruising

System Components:

  • Baffled and chambered muffler design with no internal packing
  • Muffler dimensions: 4 x 9 x 18 inches oval body
  • 2.25-inch dual inlet with 3-inch center outlet
  • 4-inch polished T304 stainless steel rolled slash-cut tip (clamp-on)
  • Tip specifications: 3-inch inlet, 4-inch outlet, 12 inches long
  • Aggressive exhaust note without excessive noise

This complete cat-back system features bolt-on installation with no welding required, allowing for professional-quality results in your driveway. Constructed from aluminized steel for corrosion resistance and durability. Backed by Gibson's Lifetime Limited Warranty.

Products specifications

Fits

2007-2021 Toyota Tundra

Muffler Dimension

4 x 9 x 18 in. Oval Body; 2.25 in. Dual Inlet; 3. in. Center Outlet.

Muffler Description

Baffled and Chambered Muffler Design, No internal Packing, Minimal Interior Drone, Aggressive Sound

Tubing Diameter

3-in.Aluminized mandrel bent tubing.

Material

Aluminized

Prop 65

Yes

Tip Description

4in. Polished T304 Stainless Rolled Slash-Cut Tip. Clamp on.

Exit Position

Exits Behind Rear Tire.

Outlet

Single

Tip Specifications

Inlet 3 in.; Outlet 4.0 in.; L-12 in.

Category

Truck and SUV

Muffler Type

Chambered

Muffler Body Length

19.000 in.

Tubing Diameter

2.500 in.

Tip Logo

None

Tip Diameter

3.000 in.

Outlet Outside Diameter

3.000 in.

Exit Style

Straight

Exhaust Type

Cat-Back

Tail Pipe Diameter

2.500 in.

Exit Position

Rear Side

Inlet Inside Diameter

2.500 in.

System Type

Cat Back

I ordered a set of inner tie rods for my car from Autoplicity and found their prices to be the lowest online for the brand I was looking for. Items were ship out in 2 business days from the original manufacturer. Shipping prices were kind of on the expensive end considering the package size and weight so if Autoplicity adjust their shipping prices to be more competitive, I think their service and pricing would be hard to beat!

Wow talk about FAST shipping...I placed the order...and the door bell rang for delivery!!! The electronic points and coil when in the FJ 4o in just a few minutes and work perfectly...THANKS so much! Larry in Montana

Very good so far.

QUICK AND EASY

Share icon
Return Policy
Returns are easy at THMotorsports

Not happy with a purchase? No problem. We've made returning items as easy as possible. And most purchases can be returned for free for 30 days. Learn more about our Returns Policy